Alert archive / New Jersey / Heat Advisories in 2021
Heat Advisory 7, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this heat advisory at Jul 15, 2021, 2:33 PM EDT for 4 states. It took effect at Jul 16, 2021, 12:00 PM EDT. It was in force for 31 hr.
The area
The counties it named.
The facts
- Issued
- Jul 15, 2021, 2:33 PM EDT (18:33 UTC)
- In effect from
- Jul 16, 2021, 12:00 PM EDT
- Expired
- Jul 17, 2021, 6:59 PM EDT
- In force
- 31 hr
- Issued by
- NWS Philadelphia/Mount Holly
All 21 counties
New Castle County, DE, Caroline County, MD, Kent County, MD, Queen Anne's County, MD, Talbot County, MD, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 64 km from the middle of the area, began a volume at 18:33 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.6 hours before the alert went out and 219 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 226 J/kg
- Mixed-layer CIN
- -103 J/kg
- Mixed-layer LCL
- 1124 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
512 WWUS71 KPHI 151833 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 233 PM EDT Thu Jul 15 2021 DEZ001-NJZ010-012-015>019-PAZ070-071-102-104-106-161000- /O.NEW.KPHI.HT.Y.0007.210716T1600Z-210718T0000Z/ New Castle-Somerset-Middlesex-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Delaware-Philadelphia-Eastern Chester- Eastern Montgomery-Lower Bucks- Including the cities of Wilmington, Somerville, New Brunswick, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Media, Philadelphia, West Chester, Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown 233 PM EDT Thu Jul 15 2021 ...HEAT ADVISORY IN EFFECT FROM NOON FRIDAY TO 8 PM EDT SATURDAY... * WHAT...Heat index values up to 102 expected. * WHERE...The urban corridor of northern Delaware, southeast Pennsylvania and New Jersey. * WHEN...From noon Friday to 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ PO
4 follow-up statements
195 WWUS71 KPHI 160801 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 401 AM EDT Fri Jul 16 2021 NJZ008-013-014-020-027-162115- /O.EXB.KPHI.HT.Y.0007.210716T1600Z-210717T0000Z/ Morris-Western Monmouth-Eastern Monmouth-Ocean- Southeastern Burlington- Including the cities of Morristown, Freehold, Sandy Hook, Jackson, and Wharton State Forest 401 AM EDT Fri Jul 16 2021 ...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 102 expected. * WHERE...Morris, Western Monmouth, Eastern Monmouth, Ocean and Southeastern Burlington. * WHEN...From noon today to 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ DEZ001-NJZ010-012-015>019-PAZ070-071-102-104-106-162115- /O.CON.KPHI.HT.Y.0007.210716T1600Z-210718T0000Z/ New Castle-Somerset-Middlesex-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Delaware-Philadelphia-Eastern Chester- Eastern Montgomery-Lower Bucks- Including the cities of Wilmington, Somerville, New Brunswick, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Media, Philadelphia, West Chester, Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown 401 AM EDT Fri Jul 16 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM EDT SATURDAY... * WHAT...Heat index values up to 102 expected. * WHERE...Portions of central, northern and southern New Jersey, southeast Pennsylvania and northern Delaware. * WHEN...From noon today to 8 PM EDT Saturday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Staarmann
320 WWUS71 KPHI 161906 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 306 PM EDT Fri Jul 16 2021 NJZ008-013-014-020-027-171200- /O.EXT.KPHI.HT.Y.0007.000000T0000Z-210718T0000Z/ Morris-Western Monmouth-Eastern Monmouth-Ocean- Southeastern Burlington- Including the cities of Morristown, Freehold, Sandy Hook, Jackson, and Wharton State Forest 306 PM EDT Fri Jul 16 2021 ...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM EDT SATURDAY... * WHAT...Heat index values up to 100 to 102 are expected. * WHERE...New Jersey's urban corridor and nearby counties. * WHEN...Until 8:00 PM Saturday. * IMPACTS...Hot temperatures and high humidity levels may result in heat related health issues for some individuals. * ADDITIONAL DETAILS...The highest heat index values will occur from mid afternoon until early evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned location, stay out of the sun, and check on elderly relatives and neighbors. Young children and pets should never be left unattended in a vehicle under any circumstance. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to the early morning or late evening hours. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing. To reduce your risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in a shaded or air conditioned environment. Anyone overcome by heat should be moved to a cool shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ DEZ001-NJZ010-012-015>019-PAZ070-071-102-104-106-171200- /O.CON.KPHI.HT.Y.0007.000000T0000Z-210718T0000Z/ New Castle-Somerset-Middlesex-Mercer-Salem-Gloucester-Camden- Northwestern Burlington-Delaware-Philadelphia-Eastern Chester- Eastern Montgomery-Lower Bucks- Including the cities of Wilmington, Somerville, New Brunswick, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Media, Philadelphia, West Chester, Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown 306 PM EDT Fri Jul 16 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY... * WHAT...Heat index values up to 100 to 102 are expected. * WHERE...The urban corridor of New Jersey, southeastern Pennsylvania, northern Delaware and nearby counties. * WHEN...Until 8:00 PM Saturday. * IMPACTS...Hot temperatures and high humidity levels may result in heat related health issues for some individuals. * ADDITIONAL DETAILS...The highest heat index values will occur from mid afternoon until early evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned location, stay out of the sun, and check on elderly relatives and neighbors. Young children and pets should never be left unattended in a vehicle under any circumstance. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to the early morning or late evening hours. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing. To reduce your risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in a shaded or air conditioned environment. Anyone overcome by heat should be moved to a cool shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Iovino
313 WWUS71 KPHI 170654 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 254 AM EDT Sat Jul 17 2021 NJZ009-PAZ101-103-105-180000- /O.EXA.KPHI.HT.Y.0007.000000T0000Z-210718T0000Z/ Hunterdon-Western Chester-Western Montgomery-Upper Bucks- Including the cities of Flemington, Honey Brook, Oxford, Collegeville, Pottstown, Chalfont, and Perkasie 254 AM EDT Sat Jul 17 2021 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 101. * WHERE...In New Jersey, Hunterdon. In Pennsylvania, Western Chester, Western Montgomery and Upper Bucks. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ MDZ012-015-019-020-180000- /O.EXA.KPHI.HT.Y.0007.000000T0000Z-210718T0000Z/ Kent MD-Queen Annes-Talbot-Caroline- Including the cities of Chestertown, Centreville, Easton, and Denton 254 AM EDT Sat Jul 17 2021 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 106. * WHERE...Kent MD, Queen Annes, Talbot and Caroline. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ DEZ001-NJZ008-010-012>015-017>020-027-PAZ070-071-102-104-106- 180000- /O.CON.KPHI.HT.Y.0007.000000T0000Z-210718T0000Z/ New Castle-Morris-Somerset-Middlesex-Western Monmouth- Eastern Monmouth-Mercer-Gloucester-Camden-Northwestern Burlington- Ocean-Southeastern Burlington-Delaware-Philadelphia- Eastern Chester-Eastern Montgomery-Lower Bucks- Including the cities of Wilmington, Morristown, Somerville, New Brunswick, Freehold, Sandy Hook, Trenton, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Wharton State Forest, Media, Philadelphia, West Chester, Kennett Square, Norristown, Lansdale, Morrisville, and Doylestown 254 AM EDT Sat Jul 17 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 103. * WHERE...Portions of central, northern and southern New Jersey, southeast Pennsylvania and northern Delaware. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ NJZ016-180000- /O.CON.KPHI.HT.Y.0007.000000T0000Z-210718T0000Z/ Salem- Including the city of Pennsville 254 AM EDT Sat Jul 17 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values up to 105. * WHERE...Salem. * WHEN...Until 8 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses to occur. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Staarmann
204 WWUS71 KPHI 172259 NPWPHI URGENT - WEATHER MESSAGE National Weather Service Mount Holly NJ 659 PM EDT Sat Jul 17 2021 DEZ001-MDZ012-015-019-020-NJZ008>010-012>020-027-PAZ070-071- 101>106-180000- /O.CAN.KPHI.HT.Y.0007.000000T0000Z-210718T0000Z/ New Castle-Kent MD-Queen Annes-Talbot-Caroline-Morris-Hunterdon- Somerset-Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Salem- Gloucester-Camden-Northwestern Burlington-Ocean- Southeastern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- Lower Bucks- Including the cities of Wilmington, Chestertown, Centreville, Easton, Denton, Morristown, Flemington, Somerville, New Brunswick, Freehold, Sandy Hook, Trenton, Pennsville, Glassboro, Camden, Cherry Hill, Moorestown, Mount Holly, Jackson, Wharton State Forest, Media, Philadelphia, Honey Brook, Oxford, West Chester, Kennett Square, Collegeville, Pottstown, Norristown, Lansdale, Chalfont, Perkasie, Morrisville, and Doylestown 659 PM EDT Sat Jul 17 2021 ...HEAT ADVISORY IS CANCELLED... Temperatures and heat index values are dropping with the loss of daytime heating and showers and thunderstorms around the area. Therefore, the Heat Advisory will be cancelled. $$
Nearby
Heat Advisories in New Jersey, 2021Heat Advisories in Pennsylvania, 2021Heat Advisories in Maryland, 2021Every heat advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.